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17-03-2017
Mathematics

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A student scored 74 out of 100 on a test. if the maximum score on the next test is 100, what score does the student need to maintain at 78

Respuesta :

18-03-2017

average=(sum of elements)/(number of elements)

78=(74+s)/2 multiply both sides by 2

156=74+s subtract 74 from both sides

s=82

So the student must earn an 82 on the next test to have an average of 78.

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